Benchmarking on XQuery Implementation in DBMS

[Wely Live]

Hi,

I am planning to research the comparison and benchmarking XQuery Implementation in DBMS (SQL Server, Oracle, DB2). There are a few question to discuss as following:
1. I wonder if anybody has ever done the similar research?
    I would be appreciate if anybody could provide my any related source or document.
2. To do the benchmarking, we of course need a sample dataset. Anybody has reference where can I find a good dataset sample?

Thanks!

Regards,
Wely
Post Graduate Student
Nanyang Technological University
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